Eollee mill



' 2 Sheets-,Sheet 1. R. J. GOOD.

ROLLER MILL (No Model.)

N0.289,088. Patented Nov. 27, 1883.

2 Sheets-Sheet 2.

R. J. GOOD.

ROLLER MILL.

(No Model.)

Patented Nov. 27,1883.

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UNTTED STATES PATENT @EricE.

ROBERT J. GOOD, OF ST. LOUIS, MISSOURI, ASSIGNOR OF OX E-1IALF TO JUSTUS RIEHL, OF SAME PLACE.

ROLLER-MILL.

SPECIFICATION forming part of Letters Patent No. 289,083, dated November 27, 188?.

(No mndehl To all whom it may concern:

Be it known that I, ROBERT J. GOOD, of the city of St. Louis and State of Missouri, have invented certain new and useful Improvements in Roller-Mills, of which thefollowiug is a specification, reference being-had to the accompanying drawings.

In roller-mills of the class to which my invention relates it is necessary to have means provided for adjusting one roll of each pair to and from its companion roll, and it is also necessary to have the journal-bearings of the adjustable roll capable of automatically yielding, so as to permit the roll to recede'from its companion whenever necessary in the operation of grinding, and then to automatically return to the adjusted position. In other words, it is necessary in this class of rolls to have a positive adjustment controllable by the operator, and also ayielding automatic adjustment. Such adjustments have been heretofore provided in different ways in this class of mills, and I make no claim, broadly, to the idea.

My invention has for its object the provision of a simple, convenient, economical, and efficient means of effecting these adjustments; and it therefore consists in the peculiar mechanism I have provided for the purpose, which I will now proceed to describe in detail, and then to sum up succinctly in my appended claims.

In the drawings, Figure 1 is a perspective view of a roller-mill of the type referred to, with one of the driving-pulleys and its shaft broken away so as to better display the subjacent parts. Fig. 2 is a section on line 2 2 of Fig. Fig. 3 is a plan, partly in sect-ion, showing part of the adjusting mechanism.

Referring to the letters upon the drawings, A B and C- D indicate two pairs of horizontal rolls such as now commonly employed in rollermills. The inner roll of each pair is jonrnaled in fixed bearings, and the outer roll of each pair is journaled in movable and adjustable bearings.

The drawings only illustrate so much of th mechanism in detail as is necessary to completely show one example of my improved mechanism.

E indicates a movable an d adj ustablcj ournalbearing pivoted and rocking upon a suitable support or standard, F, sustained and adjust able vertically by means of its screw-thread,

in any suitable way, in the frame-work of the machine. Near each end of the journal-bearing E an opening is provided for the free passage of along screw-bolt, G, and a short screwbolt, H, These screw-bolts also pass freely through suitable openings in alever, I. This lever is provided with a yoke, K, by means oi which it is carried around the pivotal standard F, and at the same time fulcrums on the block or beam F. The long screw-bolt G is provided at its lower end with a suitable head, L, forming a bearing for the lever I, which enables it to press the bolt downward. Around the upper part of the screw-bolt is a barrelspring and barrel, as well illustrated in Fig. 2,) constructed and operating in the ordinary manner, so that it need not be described in detail, and tending to force the screw-bolt upward and keep its head L against the lower side of the lever I. The short screw-bolt H is provided with a similar head, L, and with ah adjusting hand-nut, M. By means of this hand-nut and the'nut N on top of the springbarrel, and the standard F, provided with jam-nut O, the proper operative relations of the journal-bearing E to the lover I and of the adjustable roll to the fired roll. can be readily established, as will be apparent from an ex amination of Fig. 2.

I indicates another lever, which is a duplicate of the lever I, and is connected operatively with another set of adjusting mechanism (not illustrated in detail) pertaining to the rolls 0 D, precisely like that just described, except that it is in reverse position.

, P indicates an eccentric or cam mounted on a shaft, and Q its operating-lever for partially o rotating it, somewhat in the manner of the operation of a rock-shaft, at the will of the operator. The result of turning these eccentrics in one direction by means of lever Q, as will appear clearly from Fig. 2, on account of the bearings of the ends of the levers I and I upon the eccentrics, as shown, will be to raise or lower the adjusting ends of these levers as desired, and accordingly to tilt the journalbearings B, so as to carry the adjustable rolls to- I00 ward orfrom their fixed companions, accord ingly as the adjusting ends of the levers are lowered or elevated by the eccentrics. By this means the adjustable rolls may be set by the 5 operator at a given distance from the fixed rolls for operation, or they may be moved at a considerable distance-say half an inch or more away from the fixed rolls when it is not desired to operate the rolls for grinding. In addition to this adjustment, readily controllable by the operator, it is evident, from 'an inspection of Fig. 2, that the spring operating in the spring-barrel will furnish an automatic adjustment for the movable roll when I 5 the machine is in operation. Thus, supposing some hard substance or an unusual quantity of grain to be fed between the rolls, so that it may be necessary for the yielding roll to separate slightly from the fixed roll, it is evident that the journal-bearing E will be tilted so as to separate the roll slightly, because the screw-bolts H and G both pass loosely, with room for free play, through the j ournalbearing E, and through the openings in the levers I and I, and because the pivotal point of the journal-bearing E, upon which it rocks, is out of alignment with the direction of force that would be exerted upon the yielding roll by such a strain as indicated.

It is to be understood that similar adjusting mechanism is not only applied, as shown, upon one end of each pair of rolls, but is also applied to both ends of each pair, although not illustrated, and the eccentrics are placed, as usual, so as to simultaneously operate four levers I 1 and four like sets of adjusting mechanism. Thus it will be Seen I provide in the first place, by means of the screwthreaded standard and the screw-bolts G and H and their relations to the connected parts,

a Very nice instrumentality for the adjustment of the parts in setting up the mechanism, which will also serve to compensate for and accommodate wear. In the second place, by means of the spring-barrel and spring being connected suitably with the frame-work of the machine, so as to be properly supported, (not illustrated) and the long screw-bolt G, I provide a very simple, convenient, and reliable automatic adjustment for the yielding or mov- 5o able rolls; and, thirdly, by means of the eccentrics and the levers I and I, I make the adjustment positive, and within the control of the operator at will.

I am aware that such roller-mills, with certain means for different adjustments, have been constructed heretofore, and I do not therefore claim, broadlyfthe principle of such adjustments; but,

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a roller-mill, the combination of the eccentrics, the levers I and I,'the pivotal supports F, the tilting journal-bearings E,,and the screw-rods G and H, with their adj listing,- nuts, substantially as set forth.

2. In a roller-mill, the combination of the eccentrics, the levers I and I, the pivotal supports F, the tilting journal-bearings E, the 7c screw-rods G and H, with their adjusting-nuts, and the spring-barrels and springs, substantially as set forth.

In testimony whereof I have hereunto subscribed my name this 15th day of September, A. D. 1883.

ROBERT J. GOOD. Vitn csses:

CHARLES L. GRATIOT, \VM. TACHRITZ. 

